Robot Trains (2015)

Season 1: Episode 27

Due to the prolonged isolation period, Area V's energy level is unstable, and the snow starts melting, causing the Ice Cave to collapse on Victor while he is investigating the cave. Kay and Stella save Victor, but Victor needs Selly's help immediately. But because of a rise in the temperature, the entire Area V is melting, hindering Alf, Duck, Selly and Duke to get to Victor.